Apparatus for forming hollow glass articles



\ `Oct. 12, 1937.1 T. WAGH, JR

" APPARATUS b FORMANGHOLLOW GLASS ARTICLES A 0 N gwf N N ,A

a 0 A m05 -1-" AI|110 m 302 man Filed aaron 20, 193e Wf'fne'?" N as d M prsent" invention relates apparatus `i'or forming hollow glass articles, and more partici f ularlyfffforx formingfglass articles" by blowing to ,by` igid"llflls f `iUnierQthese conditions there `will `be atime during thel blowing thereof` when the `pressure rei'lliired` forfurther` and1undesired'expansionfoflmeglass. enveicowill be materially l mess; than nationally required fr-ffe =tmg the' l" lidesired blowing or `expa,risioyn of the article, this i :diminution `inpressureYbeing,rriarieuse faccortling to the present `invention effectively 1 limit the@ further, supplying-` of pneumatic pres- VSuretothe interioroi the,aiticlebeingtblowm .L i f ,Among the objectsof the-present invention are jto provide apparatus by which the continued lexpansionof glass `articles beyonda selected point i o "will be automatically stoppedlasbyventing the "`interior of the article to the atmosphere, cutting lofi the `further flow otfpressureinto the article,

` fAfui-ther object ,of theginventionis torprovide "apparatus `usingtlrie, principlesu;` above generally set forth for the manufiwftlllf:hollow` glass artil fcleswsuchr as bottles by `what iszknown as the iill i andernptyf" process. "4Specically itlis my` pur- "posefin` thisyconnection; to `providefor the limit- QBO interiorof an article withinfan open-,ended'mold f l `fvvhen theblowing"pressuresuppliedwto `blow the central Gore `portion of the glassirom that mold @fout ofthe mold. v fr d L f 1 l o i i "i i z, In the o use ofthe fiillvand-empty process, `it "has been found in` certain instances at least that they application Vof -blowingl pressure tothe interior ofthe glass in a mold which was initially "flrstl`in the desired `operation of `forcing the cen- 1 trai ,core` portion Ofelass outxofztne mold and then", in" the undesired operation oi a `blowing ,i `a `largo and sometimeswbursting .bubble of glass,

a `large bubm has been formed as aforesaid, due f to the fact that the bottom portionsrof` articles 55 havel been too thin,` Whichwould not be" the case o 2Com acolrnoration ofiDelawarejw ,o h `Ami'llicwiiui Merch 20,1936, "seriaiwNa 69,903 Sieloclaims.`

j "jex'panclthei glass insuchymanner that atleast a f i wpartpirthe articlebeingiblown isunconned l fingof the application ofA blowing pressure 'to the fhas blown the centralgcoreiportioncompletely completely; oiled with ,p1asticpgiassn has i Aresulted l whichisbelowrthe-moldin'"the event thatthe` Q moldis,he1cl` neciupperrnostfas inthe .suction j :application of this process., The `glass ofthis `i some difiicmty hsbeneiperienced when Hsighr to Hartford-Empire"Company, Itartfordo were it possible to stop the application of` `blowing pressure at `the `desired point;A While iairlylac-` l curate timing means `have been employed in controlling the application of pressure for the` pur` t pose of4 blowing out central coreportions` as afore-` `5 said in the filland empty" process, ithas been 1 ground that duettoinevitabievariationsvinthe Y `pressure :of the air employed'in" commerciali in`` ,stallations .and other irregularities, `which in practice it is .almost impossibleto avoid, the'results havenot been'as uniform` as isdesiredr` v i My `present invention aims to `overcome fthese difficulties by providing "anmeans 'automatically responsive to the diminution f in :pressurefwhich occurs when the `,centrali core portion has been blown completely outiof themold, due to the fact that the` glass `may then expand in three diinenf` v sionsfrather. than flowin'ione direction as duri ing the, `previous blowing out of the core por-J tion. Byzthe use of means automatically respon-l sive to this 4diminution of pressure asaforesaid,`

, I` am enabled accurately to cutioff and/or vent u the further iiovvl of pressure lintotheinterior of the glass atsubstantially thedesired polntvirrespective of certain variations in the pneumatic i pressure being employed.` l l i i l :Further objects of the presentiinventionwill` become apparent `from `the following- `specification. and. appended "claimslwhen takenin connection with the `acompanyingdrawing;in which: i `Figure v1 isa fragmentary View principally in verticallfsectionshowing apparatusconstlucted v and, arranged `1in `accordanc'ze, with my invention Wassociated with a known type of ll and empty"` mechanismp f ,l 3

Fig. 2fis a view` partly invertical section showr-` ing a modifiedformfof automatic control valve `for `use infaccomplislriing'results similar to those attained bytheform of the invention ishownj in ,Fig."1:andfw 1 1. l 40 Fig. 3 `is a'plan view of a portionof *thefconf struction `shown in-Flggl 'i While I contemplatethat my inventionisap- *plicable to the blowing of various types of hollow blown Vglass `articleswhere so'rne part ofthe arti-` cle or of theglasswhich *may beblownjiby the 4applicationof pressure to thf interior of the artil cle may be"`subject tdl substantialiyunconiined expansionyI have illustrated my invention `inthe accompanying drawingl as appliedj to` a known Ytype of filll-andempty mechanismfspeciflcally `mechanism such` as is lshowninj the patent" to I Peiler 1,955,765, granted April 24, 1934. 'Iheportion of Fig. 1I tothe right of theline c-b in that figure `is substantially identical `with appornon or the Peuer construction specmcsny shown in Fig.- r5 of his aforesaid patent. I have not 1 deemed it necessaryto show the entire machine for carrying out the complete forming of hollow glass articles, as the entire machine is shown and described by Peiler, so that reference may be had to that patent for a complete disclosure thereof.

Y For convenience in crass-reference between the present case and the Peiler patent, I am employing in the vpresent description as to the parts of the structure'shown to the right of the line a--b` in Fig. 1,` the ysame'rei'erence'chara'cters as'are employed by Peiler in his aforesaid patent.

AReferring toFig. 1 of the present drawing, I

have shown a blank or parison moldat M, a neck ring N cooperating therewith, va neck pin or n plunger P associated with said neckring and arranged for movement into'andout of cooperative relation therewithv in the usual manner,.and a suction and blow head generally indicated at H through which pressure and vacuum may be apl holders, one of ,whichfis shown at, these holdi ers.y being pivoted about a common vertical axis as .disclosed by Peiler.

'I'he neck ring N is also `preferably made in mating portions or halves lH iscarried by a supporting member or casting which are carried by suitable holders, one of `which `is shown at 32, these holders also being pivoted preferably about the same vertical axis as the holders .carrying the mold M. The head H29, which may form a part of 'thestructure of y the machine as specificallydisclosed by Peiler.`

, Y Suitable means arevprovided for openingand `closing the mold M preferably in a manner independent of the opening ofthe neck ring N, at least as to the opening of the mold M in advanceofand during the time the neck ring N remains closed, this being taken advantageof as disclosed by Peiler inv order to transfer a completed blank or. parison, from themold Mto a suitable iinal blowing mold, not shown in the accompanying i drawing. 1

l 'I'he neck ring N is constantly urged toward closed position by a tension spring 32a extending between the two arms or holders 32 by which the n complementary portions of the neckringare carried in a manner well knownin .the art. When it is desired to, open the neck ring to release a blank, or parisonheld therein, the halves 'of the neck ring maybe forcedapart against the teni sion of the spring 32akby the downward movement of a wedge 05 between suitable lugs or rollers 08, which arel mounted upon the holders for the respective halves or complementary,portionsy of the neck ring 1N. Suitable means Amay ben provided n, asrdisclosed by vPeiler for accomplishing the opening of the neck ring at the desired times.

` Meansare provided forconducting-vacuum to the moldM for gathering a charge of glass 'therein. Inthe ilrstrpla'ce, suchmeans includesuitr ablepassages and la control for the application lns of vacuum to grooves orductsfs formed between Amtinghalves ofthe moldLM for applying vacu tothe ymold .through the Joint -between the halves thereof. Forjthis purpose, a valve casing 03 `is securedA -in apart of the head H as `shown andis providedwith a vacuum inlet pipe ll communicating continuously with a suitable source oi vacuum (not shown) 'I'he lower-end towards its closed position as shown. When the valve 95 is opened. the interior of the member 93 is in open communication with an outer vacuum chambery 90 within the head H, which chamber communicates through passages or ducts 9B formed in the head with an annular chamber 01 in the undersideof the Ahead H, the latter com- 1 municating through a plurality of bores or ducts 98 in the neck ring N with the grooves or ducts 99'. Thus' when the valve 95 is opened, vacuum will be applied to the interior of the mold through the joint between the complementary portions thereof. r y Y c lAlso associated with the head H is a nipple theV lower annular edge portion of which is arranged tofform the upper edge'of the neck nish for the article inv cooperation with the neck ring N. Intermediate the nipple |0| and the neck pin P in the retracted or inoperative position of the latter isan annular passage-or opening |02 through which empty blow pressure may be supplied to the interior ofy the glass specifically into the blow opening initially formed'by the neck pin P during the gathering of a charge of glass-in the mold. l During the gathering operation there is a small annular passage intermediate the nipple |01 and the neck pin P vthrough which vacuum is also applied, preferably independently of the application of vacuum hereinbefore described, and through a passage sunl- ,ciently' small v4so that no glass will penetrate thereinto; I

Associated-with the head H in ya manner to confine the nipple r|0| in position is a sleeve member. 92, which passes-through the chamber 90 as illustrated,but' prevents communication between that chamber and the mold M except as hereinbefore described.' `Inside the member 92 is a vertically movable stem or plunger |05 into the lower end of which the neck pin P is threaded. The upper end of the stem |05 carries resiliently connected thereto a cap member |05, which is so arranged as to cause a resilientV downward movement of the neck pin P from its inoperative position shown in F'ig.v l' to its-lower operative position through the intermediation ofl a compression spring |08 confined between the upper end of the cap |06 andthe upper end of the stem |05. On the other hand. the neck pin P may be positively withdrawn from its operative to its inoperative positionrbylupward movement of the cap |06,'due to pins |01 carried by the cap engagingfagainst the upper ends of grooves or slots 250 inthe stem |05. Suitable means including `Athe'links |32'are provided for actuating the cap v n and the sleeve member 92, so that this vacuum :mv communicate with the interior of the neck l; ringlfN `-through `the space corresponding to `that t;

t l shown at fl 02, but tlwith thelneck Yring P in itslower Q 5 operative position, forgathering; a charge of glassA entlforla completedisclosure thereof.'` 1 nIn4 operation, the mold M is `moved tuarposi- ,tiondnrelation to a gatheringpool such that upon l ingg butlreference" may behad` to the4 Pelles `pat- Subsequentto the filling-,ofthe mold,` itis -raised 1 out of Acontact `withgthe glass inthe gathering pool and the neck pin Rretracted to theposition shown in Figfl` of" the accompanyingdrawing. y AThe apfyplication oi' vacuum through the ,neck ringfrom ,:theniannular space BI is cut oilpriorto the retraction of fthe neck pin, but may be continuously applied to the body portion of the article ,through "wplying of pressurepthrough the neck Vring tothe i v space Slgommunicates atlits uppenendwith a pipeshown at I00a, (numbered `|08 inthe;Peiler that theline ab` passes., as shown in Fig. Li dividing the subject matter copied `fromlleiler for ing said invention.

`the `fact that after the vfempty blow?? haspro- `gresseul` to the pointsuch thatthe central core `portion is blown corriplP-iK-ilyf,1uutgof` the mold, so that` the-cavity being enlarged `rnay` expand in A CFL that thisibubbie `would norbetqo.greauyemargea sothat the glassI forming it would not bentoo diillcultpto asslrnilatewith` the glass `in the gathl n ering pool. @Diiilculty was, howeverexperienced in `timing the cutting of! of this pressure duelto vaiationsfin the pressure availableioryuse` with F30 the `machine and other causes.`

My present inventionlaims to,;provideauto maticallyfoperatingmeans responsive to thedlmt, the atmosphereand thereby causingawcessation 'of thefurther suppiyingof` pressure tothe lnterior of the glassor of positively cutting 'oiIfthe v Inrtherrlow of pressure, or both. Referrin *now to the `portion of Fig, `l to the y ,Lwhich communicates withffthe pipe` I00a` Lthrough "a" valve generally;` indicated at `202. ThisV valve I forms nof part ot n the `present invention, mit has` not` been, illustrated in the `accompanying; draw- A .s above `generally set` forth, there has vfbeen t `sornegdiiicultylexperienced in practicingthe jnll ,Y `andempty?processi?,s disclosed `,by Peilerdueyto l :fit :H l `time thg'application of v 'n i,pressure and specifically: thekcutting foil ther-enf.:

`lnution in pressure `caused `by the central core por--` f: tion havinglbeencompletely blown out of the mold i forventing theinterior of the hollow glassbeuglvtoY fiefcofitnqilne in fnatngure..;theref1s mais- 1 trated a pneumatic pressure. supplyfpipe,201.` s

accuses `202` and the valve 205 ftheenulicatlcn-nvtivacumn tothebodv portion 0f themold "throug'hfthe grooves 99 and Lto theneck f f, Pcrtibnwthroushtthe annular` space, 9| ashereln a described, themold Lcompletely filledwith plastic gla`ssthe neclrtpin` Pbeinglin its lower j operative position" during this gatheringoperation.`

" ypatentls It is through a portion of` this pipe `[00al purposes of illustrating the `applicationof [my:` A present invention fromthat specically ,embodyf ,three;dimensions,` insteadfof in 'onei-asythereto- Y reduced that a` large bubble was formed,` which t n t n f ,l For 4eilecting `an1automaticymovement of the valve `202` to `cut on' andventthe pressure within fellvelope."` i n Onlthe Othlfhldfdllring the gathering `of a therefis, `oi' course, no pressure `the valve 205 tocause this valve to cooperating, with a suitable seat inthe usual `inanner.`

, v `inpndownstream"side of thefinthemold M. `Inasmuohas `thisnneans per se Formed inpart of the valve 202 andonthe valve 4203 `and'its` seat "203 controlling communication between the sup?" is a port opening 204 controlled by a puppet valve 205which is mounted for freersliding` movement `upon an extension 'lll'of` thefstem 2011 to which 1 the valve `,203` is gsecured. 1: Intermediate" the `valve is a compression spring208,' 1 4 which tends to move kthe v`alve`205loi` its seat when the valve 203 is seated as shown. Excessive' movemenig-oi` the va1ve-`205 Valongthe extension 20B n is preventedbyla `nutVorwother rabutment S-sei cured totheextension 206 belowlthe `valve 205.

fn'l'husHlf` ,their stem"20'| -is positively -raised "as hereinafter set` `forth,` valve "203 will be` positively `unseateoxlland` valve 205 will be positively seated to close the port 204, dueto the engagementv of the abutment 200 with the undersideof valve 205. Thisis the position `oillthe parts when pressure is being suppliedli'rom the `smircethrough pipe 20 I to 1, blowthe central core t portion sofi glass out ofthe mold M-as aforesaid.; `After the central core portion has been forced completely out of the mold,

t thevalve stem 2011s moved by means hereinafter the grooves 00." The next operation iS the S1111#4 f n toffbe described -`to the position ishownf in Fig.` 1,

I s cutting-off` the. continuedV ilow"*of^ pressure into `cavityformedinitially by the neck pinP to form y lanenlarged cavitywithln the mold Mbyblowing n the, `central `core-portion` `oi' `glass substantially 1 completelyput oftthe mold. f For thispurpose the theinterior of the glassin the mold: and exerting vtlveZiiSand` hence @to vent the interior `of" the ,glass tothe atmosphere,throughthefexhaustport 204.Itwili be ,i as to `the `valve 205 tbysuchjlresidual pressure Aas pipe im and within me" glass fseen that this l will fbe assisted remains within the `charge o! glass, t t t being supplied through the pipe20ljia'nd`under these conditionsqthe valve 12031 is `normally closed.

n Thlaas abover.setlrortmwould tend to cause thelvalve205 .toopen in the position shown. However,

the vacuum:4 which is at this time in open* communication `with-the pipe` I08a through'the head `,tends toidrawlin airthroughthe V close. automatically against the cmpressionfot the light: spring `208, so that `theivacuum broken at this point. 1

ythe glassxasaforesaidyfI prvideadiaphragm acltuatingamechanisrnsgenerally indicated `'at `2I0, including a chamber 2II, theilower,` portion 5 of whichzvisuin communication through a.` pipeilz` Withzthepipefllla. `:`A` exible"`diaphra`g`m Ulis extended across thischamber between the upper s and lower portions `thereof and` isV rigidly "connected atits center at2I4 `withthevupper `end of the `valvel stem 20?.` There isnlsolfprovided a@ i Vrelatively light compressionjspring: 2 I 5` extending between the upper side of the diaphragm2l3 land a suitable adjustableabutmentZIS formed on the `l lowervendof a set screw 2 I 1l threaded through an ,-upperccasing extension 2I8, whichis secured'to the casing 2H.,1 The `casing 2| Ils vented aslillustrated at IIS-above theidiaphragm, so thatlthis. L portion `oljthe'passing willalways? contain airfatl atmospherlc pressure. A i Thus; when` the `pressure i isebeing supplied to`- the inside ofi the `mold Mitten` the enmity".blowi',` valvejstem ,201 ^will be in its willi Anot i" be `eil'ectively l raised g positionnsaforesaid and pressure will rbe maintained,imneath` the` diaphragmng! |2- in` `the f, when! is maintain velveevenv" Bwcver; z5 t n lo vTurning now to' the form of, the invention.

inthe glass in the mold M drops materially, due i.; to the. central core portion of glass having .been lwblownfcompletely out ot the mold through the 1 5.- lower yopen end thereoifpressure within the Vcasl ing 2| iiopposing the spring 2|5 will be materially'1 forth in describing the Fig. 1 form of invention.

reduced, rpermitting, the spring 2|jto exert pressure upon the `valvestemx201 through'the flexible diaphragm and cause the closing of the valve 203 and theopening of the; valve 205, asabove set forth.,..-f 5

Fromthe above, itfwill be seen that there mustl neeessarilybeyprovided in addition Vto the above described parts, somemeans for initially opening the valve f203 for theinitial supplying oi pressure within an article by moving the valvestem 201 ln opposition to the spring 2li.' Forthis'purp'ose 'there isprovided on the .valve stem 201 a piston AV2 20 .arranged `for .vertical movement 'ina cylinder 22| iormedlnthe upper head ofthe valve 20 202 andopen above .the piston 220 Vto theatmosphere. Communicating with the lower' part oiY this cylinder below the piston 220,-is"a pipe 222 `arranged `toconductpressure yto the cylinder at the proper moment/fromv some suitabletiming melma, Such as that disclosed inthe Peiler patent above mentioned.` This pressure need be supplied but momentarily, just suiilcientto move the valve 2stem2|l`| upwardly,andis supplied preferably-at thesame instant that pressure is supplied through ytheLpipe 20| toefi'ect thefempty blow" of -the l glass, in `the mold M.y `Oncethis blow has been @starterduet@ nieuwe m mung off its seat, L pressure throughY` the `pipe 222 may Vbe discontin" ued and vented as the diaphragm 2|3'will. be

maintained in` its luppermost vposition vby pressure ,passing into the lower part-of the chamber 2| lthroughtheppipe2l2." I u .I l -K The-complete operation of the ydevice will be obvious from the abovedescription.

'j shown in Figs. Zand 3,.pressure;isconducted to the pipe |004 from'somesuitable source, through the pipe 30|which corresponds. functionallyto 45..,the pipe 20| of the form of the .invention shown lang. 1.y Connected to these pipes .in some manner.. as, for example by a;.T,-' 302 Vshown in Fig. 2

is a pipe 303 leading to a duplex valve generally 'indicated at m. This valve 1s constructed of a main member "Sinto the lower portion of-which is threaded a nipple 303, whichu is in turn con- Vrieeted tothe pipe ,303 asshowm In-a, .central i chamber formed inv the-,member `301i, there isii- Ylustrated a freely movable valve. ball 301,which may seat in either oneof twodirections, above and below as.` seenjin Fig. 2. The lower seat'300 A is provided inthe member 305.1.;.The upper seat 300, uponwhich the valve ball 301 is=shown seated, may be formedin amember 3 0,- -whichfis threadedinto-the upper portion of themember 305 as :shownf Threaded intothe member 3|0 andadfiustable in respecttheretois a nipple member 3| constructed similarly to the member 303.` Both 70 ber 0 lili is provided .with a'continuously open portL 314 communicating with the atmosphere. i f Thuajii theivalveball 3011s at some intermeme position on'btn its seats, the pipe :or is `in open communication with the atmosphere @through an .open passage lextending axially these members 300 and 3|| are provided with rey through the entire valve 304 and its component parts' and -around the ball 301 in the chamber intermediate seats 308 and 309.

Duringthe gathering of a charge of glass, vacuum is applied within the mold M and. communicates directlywith the pipe |08afas above set This vacuum will pull the ball 301 down onto its seat 303 againstv the compressionof the spring 3|2, due tothe inflow 'of air through the port 3|4 forcing the ball downward. This will cut off communication between thevacuum and the atmos- 'phere throughv the v alve `30'4'and hence permits proper gathering of a charge of glass. At 'the ter- 'tion of glass isbeing forced out of the mold,

pressure will also flow through the pipe 303 into the valve 304 and will force the ball 301 to move "onto its upper vseat 309 against the compression of the spring 3|3, thus again closing oi communi- 'cation through the valve 304 'to the atmosphere through port 3|4. However, after the central core portion of glass has been forced completely sive force effective by'springs 3|2 and 3|3 is required. For this purpose each of the nipples 306 and 3|| is adjustable in respect to the valve 304 so as to control theeifective compressive force of these springs upon the valve ball 301, the adjustment 'after being made `being secured by "fjam nuts 3|5 and 3| 6 respectively.

f From the above, it will be seen that I have provided automatic means by which pressure may be vented to the atmosphere and effectively cut off in response to a diminution in the pressure existing within a body of glass being blown to hollow form. f

It will be vunderstood that while I have illustratedV and specifically described the invention a's applying to a structure for manufacturing glassware by the fill and empty process, particularly as shown in the Peiler Patent 1,955,- 765as aforesaid, IY do not wish to be limited to this `particular application of the invention, but contemplate that it may be useful wherever glass is beingf blown to hollow form and is not completely confined, such for example as in the intermediate blowing step of. the usual paste mold process of manufacturing hollow glassware, and also other uses which will occur to those skilled in ytheart. I do not wish to be limited, therefore, except by the scope of the appended claims, which are to be construed as broadly as the state of the prior art permits. I claimzA l. Apparatus for forming hollow glass articles, comprising a support for a mass of plastic glass to be formed into a glass article, means for supplyingpneumatic vpressure to the interior of the mass of glass held ln said support to expand a cavity therein, and meansoperating automatically and'in response to diminution in the pressure existing within said cavity during the expansion thereofforvcausli'ig a Adiminution im@` subply of i the pneumatic pressureto` said cavity.

` `2.. ,Apparatusfor forming` hollowglass articles, `comprising a support fora mass `oi.' plastic glass to be formed `into a glass article, meansforfsupplying `pneumatic pressure to the` interiori ofv the mass of glass; `held in said support to; expand a cavity thereinyand meansfoperating automatically andiin response to diminution inthe pressure existingwithin said cavity Vduring theifexpansion thereoi'iforl venting` said cavity` to' the. atmosphere and for thereby inhibiting the further `expansion oifsaidrcavity. i f x i i t i i i i 3. Apparatusfor forming hollow glass articles; comprising amold adaptedfto be completely lled with `plastic `glass xthrough'` an open lend thereof, means for supplying pneumaticrpressure tothe interior of saidmold through the opposite end "3 i thereof to blow: the centralv core` portion i of t a 11 20 i openyenti and,y means operating automatically charge lofuglass` out ol?` the *moldl through` said and inresponse to` a` diminutioniin thepress'ure existing i within said moldduring the blowing out ofthecentral core portiontl of glass for caus-l ing a diminutionoffthe supply of. the'pneumatic pressure to saidmold. f i i i, i i

` f4. Apparatus i for. forming hollow iglassfarticles, comprising al moldadapted` to 'be completely iilled i y with plasticiglass through anA open` end thereof,

means for supplying pneumatic pressureto the interiorfof said` moldthrough the opposite end thereofto blow the centrall core portion of a i charge of1glass `out of themold through said open 1 end, andlmeans operating automatically and in responsetothe central core portion of a` charge" of-glass `having been blown completely" out of the` mold for causing a` diminution` of the supply of thetpneumatic pressure to* `said` mold.

i Apparatus for forming hollow glass; articles, "comprising a mold adapted to be completely iilled `with plastic glass through an open end thereof,

"means for supplying pneumatic pressure to the `interior of 'said mold through `the opposite end thereof to blowthe central core portion oi a charge of glass out of the mold through said t open end, and means operating automatically and in response to a diminution in the pressure existi ing within said mold` during the blowing out of said central` core portlonof glass for venting the interior of. the `hollow body of glass in the mold to the atmosphere. t 6. Apparatus for forming hollow glass articles, comprising a `suction gathering mold adapted'to be completely filled with plastic glassdrawn' in through the open lower end thereof, a neck ring and a neck pin cooperating withthe upper end of said mold for forming a finished neck portion on the glass drawn into the mold and an initial blow openingA therein respectively, means for applying vacuum to saidmold to gather a charge of plasticiglasstherein, means thereafter operating to supply pneumatic pressure through said` neck ring to the initial cavity formed in the glass by said neck pin to` blow the `centralcore portion of a charge of glass `out of the mold` through the open lower end thereof, and means operating `autoi'natically and in response to a diminution in the pressure existing within said mold during theblowing out of the central core portion of glass for causing a diminution of the supply of the pneumatic pressure to saidmoid.

"1. Apparatus"` for forming` ollow glass ar-` ticles, comprising a suction gathering mold 7 adapted tobe completely fliledwith plastic glass drawn `in through'thegopen lower end thereof,

i i i i i i 5 a neck ring associated with theupper end ofl said mold,` a neck pin ,arransedto bemoved into and out of cooperative relation with said neck ring, ai'head associated with `saidneck` ring and neck pin, means associated `with'the i aforesaid memhers4 for substantially independently` applying vacuum totheV body portion `,of said moldand to said `neck ring aroundlsaid neck pin in the operativeiposition of the latten, means for supply- `ing` pneumaticivpressure, through said head to the cavity in the glass formed bysaid neck pin subsequent tothe cutting oi! of` vacuum around the neck `pin andthe@ `movement thereof to its inoperative position'to blowthe central core portionof a charge of glass out oi' the mold through the open lowerend thereof, and meansoperating automatically and in responseto the'central core portion of: a charge of glass Ahaving been `blown completelylout of themoid for venting the inl teriorofthe hollowabody of )glassA` in themo1d tofthe atmosphere. ,y i 8. `Apparatus iorformingxhollow glass articles, comprising a mold adapted to be completely filled with -plasticglass through `an open end therei,

of; means including l a pipe,` for conducting pneumatic pressure to the interior ofs'aid vmold through the `oppositegendthereof to `blow the Y central core portion of a charge of; glassiout of the moldfthrough said open r end, andxan automatic diaphragm actuated valve interposed in saidpipe and so constructed and arranged as to cut oil the `flow i of pneumatic pressure through said pipe to theinterior o1' the'body of glass in the controlling a vent to the atmosphere'from the portion of the pipe on the downstream side of said valve, and diaphragm actuating means for operating said valve so constructed and arranged as to cut off further iiow of pneumatic pressure through said pipe to the interior ofthe body of glass in the mold and to vent the interior of said body of glass to the atmosphere both in response to a diminution in the pressure existing within said mold during the blowing out of the central core portion of glass therefrom.

10. Apparatus for forming hollow glass articles, comprising a suction gathering mold adapted to `be completely filled with plastic glass drawn in` `through the open lower end thereof, mea for applying vacuum to the upper end of said nold for gathering a charge of plastic glass therein, means including a pipe thereafter operating to supply pneumatic pressure to the interior `of said mold to blow the central core portion of a charge of glass gathered therein out through the open lower end of the mold, a compound vaive associated with `said pipe having a portion arranged to open and close communication betweenl the portions of the pipe `on opposite sides of the valve and a second portion movable with and in respect to the first named portion for opening and closing a vent opening communicating between the portion of the pipe on the downstream side of the valve and the atmosphere, a common valve stem carrying both said valve portions, diaphragm actuating means communicating with said pipe on the downstreamrside of said valve and arranged to actuate said valve stem, the parts being constructed and arranged so that upon diminutionin the pressure within the body of glass .in said mold caused by the central core portion having been blown completely out of said mold, saiddiaphragm will bemoved to close communication between the two portions of said pipe on opposite sides of said valve and Ato kopen communication between the downstream side of said valve and the atmosphere,` and means for resetting said valve for opening communication between the two portionsof said pipe for the supplying `of pressure tothe interior of said mold, the portion of said valve Vcontrolling the` vent to the atmosphere being so: arranged that upon the application of vacuum to said mold for. gathering a charge of glass therein,V said ventl will automatically be closed by said vacuum.

11 Apparatus for forming hollow glass arthe atmosphere for ventingk the interior'of the hollow body of glass in the mold, ai valve controlling exhaust of pressure `through said port so constructed and arranged as to leave the port open for exhaust when no pressure is being supplied. to the interior of the glass in the mold or 4o when that pressure falls below al predetermined 12. Apparatus for forming hollow glass articles, comprising a suction gathering mold adapted to be completely filled with plastic glass through the open` lower end thereof, means for `applying vacuum to said mold to gather a charge of plastic glass thereinto, means including a pipe thereafter operative to supply pneumatic pressure into the glass in said mold through the upper end thereof to blow the central core Aportion of the glass out through' theI open lower end of,VV the mold, a duplex valve associated with said pipe and having an opening to the atmosphere, a movable ball valve member therein, two seats in said valve for cooperation with said movable ball member, the seating of the ball upon either of which cuts oil?A communication between said pipe and the vent .to the atmosphere, and a spring cooperable with said ball and associated with eachvof said seats for urging the ball off said seats respectively, the parts of said valve being so constructed and arranged' that upon the application of vacuum to gather a charge. in said mold as aforesaid, the air rushing into the valve through the vent thereof from the atmosphere will force the ball memberyonto one of said seats in opposition tothe spring associated therewith, the application ofpneumatic pressure to. the mold tol blow the central core portion of glass out ofthe mold vas aforesaid being .effective to force the ball member onto the other of said seats against the spring associated therewith to close the vent to the atmosphere, and a diminution in pressure within the mold due to the central core portion of glass having been blown completely out of ,the mold will be effective in conjunction with the spring associated with the second-named seat to unseat the ball member therefrom and open communication between said pipe and the atmosphere through the vent passage of said valve. y

THOMAS WAUGH, Jn. 

